Cleaning the metal face of a Jeff Rowland Model 3


For reference, here is the unit:
https://www.hifi-advice.com/blog/jeff-rowland-company-special__trashed/jeff-rowland-power-amplifiers...
Anyone know how to clean one of these metal faces?  Mine has a couple of splotches.
Also, anyone know if you can replace the faceplate of a Rowland with the newer polished look?

idfnl

As the OP did, I called JR at the telephone number the OP provided and received the same advice from a nice persons at JR.  The person answering the phone passed me to a person in shipping who said they use that product: 
"spray it on and the stuff, tape and such, just comes right off".  I am not holding them to any responsibility if it doesn't work but was nice to know JR works like a small company where people all over the org will speak with customers trying to give a solution.  Thank you idfnl

I have successfully used womens gentle face cleanser to remove grease marks from anodised faceplates without damaging the surface.
Post removed 
GooGone? Do you really expect to have adhesive residue, crayon, and food stuck to your amp?


Thank you, I called and spoke to a nice lady. They use a product called "Original Bike Spirits Spray Cleaner & Polish"
The modern metal face is not available for the Model 3.
I'd ask Jeff. If you call, his assistant will put you through to him.
Phone: +1 719-473-1181